子查詢linq

嘿，我想在linq中做一個子查詢，但子查詢是一個值，它似乎不工作，任何人都可以幫忙嗎？我正在使用entit框架工作，我一直得到和INT字符串錯誤不知道爲什麼。子查詢linq

from lrp in remit.log_record_product 
           join lr in remit.log_record on lrp.log_record_id equals lr.log_record_id 
           where (lrp.que_submit_date >= RadDatePickerStartDate.SelectedDate) && (lrp.que_submit_date <= RadDatePickerEndDate.SelectedDate) 
           select new { lrp.que_submit_date, 
            lr.officer_name, 
            lr.c_fname, 
            lr.c_lname, 
            lrp.price_sold, 
            lrp.product_cost, 
            gap_account_number = (from gap in remit.gap_contracts where gap.log_record_product_id == lrp.log_record_product_id select gap.account_number), 
            iui_account_number = (from iui in remit.iui_contracts where iui.log_record_product_id == lrp.log_record_product_id select iui.account_number), 
            dp_account_number = (from dp in remit.dp_contracts where dp.log_record_product_id == lrp.log_record_product_id select dp.account_number), 
            mpd_account_number = (from mpd in remit.mbp_contracts where mpd.log_record_product_id == lrp.log_record_product_id select mpd.product_account_number) 
           }

來源

2010-06-14 user297378

你得到什麼錯誤exctly和哪一部分？ – Vishal 2010-06-14 22:21:32

每個子查詢返回一個Enumerable<Type>

嘗試使用(from c in collection).First()或使用(from c in collection).FirstOrDefault()

來源

2010-06-14 22:32:15

或'.Single（）'，如果沒有兩個賬號應該有相同的'log_record_product_id' – 2010-06-14 22:40:05

回答

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